There are minor jump-cuts with a length of less than 0.5 sec that have not been considered in the following comparison.

Basically, there are 4 versions. On the one hand, there are the rather short "German Theatrical Version" (approx. 95 min) and the "US Director's Cut" (approx. 101 min), on the other the much longer "Spanish Extended Cut "(approx. 268 min) and the "Mini Series" (approx. 52 min per episode) which is also the longest of all versions.

Since I am neither familiar with the "German Theatrical Version" nor the "US Director's Cut", there is not much I could say about those two. But the fact of the matter is that the Theatrical Version lacks almost 3 hours (!) of footage . compared to the Extended Cut. And since the Director's Cut is only 6 minutes longer than the Theatrical Version, I think it is safe to say that both versions confine themselves to necessities. Which is a shame, really, because the long tracking shots and the slow pace are crucial in my opinion. Both the Extended Cut and the Mini Series take their time to tell the story very detailed. With a length of approx. 52 minutes per episode, the Mini Series is even longer than the Extended Cut - despite the opening and end credits in every single episode.

Time index refers to
Spanish Extended Cut - Mini Series (both in PAL).

02:06:36 / 00:00

The mini series starts with the opening credits, followed by a recap (no screenshots).

262.44 sec resp. 4 min 22.44 sec

Extended Scene02:10:03 / 07:51

Smith and Neb slightly longer.

1.56 sec

Additional Scene02:10:18 / 08:07

Then a distance shot of the group in their cave.

25.04 sec

Extended Scene02:10:18 / 08:32

The subsequent shot of Herbert starts earlier.

7.44 sec

Extended Scene Extended Cut02:15:00 / 13:21

Nemo insignificantly longer in the Extended Cut.

Extended Cut 1.2 sec longer

Extended Scene Extended Cut02:23:12 / 21:31

Now Spilett.

Extended Cut 1.12 sec longer

Additional Scene Extended Cut02:23:31 / 21:48

The Extended Cut contains an additional shot of the group leaving their cave.

Extended Cut 9.44 sec longer

Additional Scene / Partial Recut02:23:41 / 21:48

Now a longer scene that is missing in the Extended Cut. At first, we see Spilett, Pencroft and Herbert on the boat. Pencroft is singing.

Then Smith and Neb who stayed on the island. Neb wants to know why did not join the others and Smith explains it to him. Furthermore, Smith wants Neb and the dog to wait for him while he (Smith) walks up the mountain. But Neb has other plans.
Later on, this part is also in the Extended Cut.
Diesen Teil gibt es einige Zeit später auch in der Extended Version zu sehen.

76.8 sec resp. 1 min 16.8 sec

Extended Scene02:23:41 / 23:05

Pencroft sings longer.

20.44 sec

Extended Scene02:23:47 / 23:32

Ditto.

6.08 sec

Extended Scene02:24:02 / 23:53

Spilett and Herbert a little longer.

0.8 sec

Extended Scene02:24:26 / 24:18

Pencroft a little longer.
1.8 sec

Extended Scene02:24:32 / 24:26

The shot of Spilett and Herbert is longer as well.

1.08 sec

Extended Scene02:24:34 / 24:29

Pencroft longer in the mini series. Also, the Extended Cut contains a small cut to Spilett and Herbert (already seen in the mini series). Nonetheless, the mini series is a little longer.

5.4 sec

Additional Scene Extended Cut / Recut02:26:03 / 26:03

Now the scene with Smith and Neb from the mini series: Smith explains to Neb why they stayed on the island & Smith wants Neb to wait for him (please see 02:23:41 / 21:48). (no screenshots)

Extended Cut 49.96 sec longer

Additional Scene / Partial Recut02:26:53 / 26:03

The mini series shows Pencroft, Spilett and Herbert reaching their destination instead. They push the boat on the beach but their arrival has not been unnoticed resp. they are being watched.
At least the last part of that scene (getting the boat on the beach and the pan to the bushes) are also in the Extended Cut.

86 sec resp. 1 min 26 sec

Extended Scene02:26:53 / 27:29

Smith earlier.

12.96 sec

Additional Scene Extended Cut02:27:14 / 28:03

After Neb calls after Smith that he should wait for him, only the Extended Cut shows Smith waiting for Neb resp. Neb catches up with Smith and shows him his device that is supposed to protect him from the security system.

Extended Cut 12.56 sec longer

Additional Scene Extended Cut / Recut02:27:27 / 28:03

Now, Spilett, Pencroft and Herbert get the boat on the beach in the Extended Cut and they are being watched while doing so (please see 02:26:53 / 26:03). (no screenshots)

Extended Cut 35.92 sec longer

Additional Scene02:29:15 / 29:15

Additional footage of Spilett, Pencroft and Herbert in the woods.

24.96 sec

Extended Scene02:29:15 / 29:40

The subsequent shot of them starts earlier as well.

15.12 sec

Extended Scene02:29:52 / 30:33

And so does the following shot.

1.12 sec

Extended Scene02:30:01 / 30:43

The three earlier again.

9.6 sec

Additional Scene / Partial Recut02:37:11 / 38:02

Smith and Neb keep walking up the mountain.

Then the security system that can't harm them anymore.
Later on, also in the Extended Cut.

64.44 sec resp. 1 min 4.44 sec

Extended Scene02:37:11 / 39:07

Smith and Neb longer.

14.4 sec

Additional Scene Extended Cut / Recut02:37:37 / 39:47

Now, the Extended Cut shows the security system as well (please see 02:37:11 / 38:02). (no screenshots)

Additional footage of Smith and Neb. First a distance shot, followed by a close-up.

29.36 sec

Extended Scene02:39:31 / 42:53

The mountain much longer.

34.04 sec

Additional Scene02:39:38 / 43:34

Additional footage of Smith and Neb. The latter says there was not any kind of living creature and Smith agrees. A further shot from their point of view follows.

18.36 sec

Extended Scene02:39:38 / 43:52

The following shot of them starts earlier.

4.04 sec

Extended Scene02:40:07 / 44:26

Neb believes to have seen something move. Smith asks where. Only in the mini series, Smith asks one more time and Neb explains he could not see it anymore.

6.56 sec

Additional Scene / Partial Recut02:40:34 / 44:59

Here, we have a longer sequence. The beginning of it is only in the mini series.

At first, there is footage of Grant on the island he stranded 16 years ago. He still hides from Spilett, Pencroft and Herbert resp. he still keeps an eye on them. The three of them then are inside some cabin. They are buiding to trap so Grant can't get away anymore. They then walk away conspicuously inconspicuous. When they are out of sight, Grant sneaks into the cabin and walks right into the trap. Spilett, Pencroft and Herbert are happy that it worked.

At least the last part of the scene (Spilett builts the trap, they leave the house, Grant sneaks inside, walks into the trap and the three of them are happy it worked) is also in the Extended Cut.

Back to Smith and Neb. Smith says there were no more tracks. All of a sudden, Neb sees an unconscious person lying on the ground.

183.76 sec resp. 3 min 3.76 sec

Extended Scene02:41:35 / 49:04

Smith and Neb carry the unconscious guy insignificantly longer.

0.6 sec

Additional Scene Extended Cut / Recut02:42:10 / 43:39

In the Extended Cut, Grant now walks into the trap as well (please see 02:40:34 / 44:59). (no screenshots)